Buckle



FIG. 1 is a bottom and left side perspective view of a buckle, showing my new design;

FIG. 2 is a top and right side perspective view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a front view thereof.

The broken lines in the drawings represent portions of the buckle and form no part of the claimed design. The other broken lines in FIGS. 1, 3, 7, and 8 represent surface indicia and form no part of the claimed design. 

CLAIM The ornamental design for a buckle, as shown and described. 